diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/wmemset.h')
| -rw-r--r-- | sysdeps/x86_64/multiarch/wmemset.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/wmemset.h b/sysdeps/x86_64/multiarch/wmemset.h new file mode 100644 index 0000000000..d761985a47 --- /dev/null +++ b/sysdeps/x86_64/multiarch/wmemset.h @@ -0,0 +1,42 @@ +/* Common definition for wmemset/wmemset_chk ifunc selections. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <init-arch.h> + +extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned) attribute_hidden; +extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned) attribute_hidden; +extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned) attribute_hidden; + +static inline void * +IFUNC_SELECTOR (void) +{ + const struct cpu_features* cpu_features = __get_cpu_features (); + + if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER) + && CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable) + && CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load)) + { + if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable) + && !CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_AVX512)) + return OPTIMIZE (avx512_unaligned); + else + return OPTIMIZE (avx2_unaligned); + } + + return OPTIMIZE (sse2_unaligned); +} |